Some are too ill to stand so slumped on the pavement, waiting for their dose of hope, despite V-1 being denounced by health officials in Thailand.

The disease has ravaged families across Thailand

HIV has brought misery to thousands of families across Thailand.

Just how many people are infected here is unclear.

Estimates put the number of Thais having HIV - the virus which can lead to Aids - at between 750,000 and 1.5 million.

Most infected people here have no access to drugs that have been
successfully used in the West.

Promboon Panitchpakdi from the aid group CARE Thailand told the BBC: "Many people will do almost anything to try a drug in which they only have 10% faith because what other choices do they have?"

Made from blood

V-1 Immunitor is made from the blood of HIV-positive patients along with calcium and magnesium and costs each patient $20 a month.

One 53-year-old HIV-positive patient told BBC News Online the drug had done wonders for his health.

"V-1 has made my life better. I now live with hope," he said.

There is a lot of money to be made by evil people through this disease

Alex Renton, Oxfam

Other patients have startling claims to make.

Grace, a single mother from Tanzania, insisted her son had been cured of HIV after taking the V-1 pills for several months.

She urged the army of doubters to think again.

"They must believe, because it's not only my son who [has become] negative, there are more than 10 people who use V-1 for three years and they get negative too."

'Unwanted diversion'

Some welfare organisations here believe the controversy surrounding V-1 and other unlicensed vaccines is diverting attention from the urgent need for Thais to access clinically proven anti-retroviral drugs that have reduced Aids-related deaths in Western countries.

Alex Renton from the Bangkok office of the Oxfam aid agency believes Thailand is becoming a dumping ground for other treatments that have been tested unsuccessfully elsewhere.

"We are seeing some international companies using Thai HIV-positive people as guinea pigs to try out drugs that in some cases have already failed their trials in Europe and the United States," he said.

"There is a lot of money to be made by evil people through this disease."